Window-stage.



PATENTED JAN. 22, 1907. B. F. EARL.

WINDOW STAGE. APPLICATION FILED DEC. 15. 1905.

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f z/wew/vv t' iqw gcw WW0 @814 Q y A cflwowne z az BENJAMIN F. EARL, OFBOSTON, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TO FREDERICK W. TIRRELL, OFQUINCY, MASSACHUSETTS.

WINDOW-STAGE.

Specification of Letters Patent.

Patented Jan. 22,1907.

Application filed December 15,1905. Serial No. 291,866.

stage projecting outside of the window andforming a convenient platformfor persons to work on the outside of a building. By placing two ofthese stages in adjacent windows and by putting suitable boards orplanks from one to the other a staging along the side of the building isformed.

My invention has for its object to provide a window-stage of this kindwhich shall be stronger, more secure, and easier to put in place thanthose heretofore used.

A window-stage embodying my invention when put in place may be used withabsolute safety, there being no danger of its becoming displaced.

My improved window-stage is also capable of use with windows of variouswidths and with various styles of casing and sill.

The invention will be readily understood from the following description,taken in connection with the accompanying drawings, and the novelfeatures thereof are particularly pointed out and clearly defined in theclaims at the close of the specification.

In the drawings, Figure 1 is a plan view of a window-stage embodying myinvention. Fig. 2 is a side elevation thereof. Fig. 3 is a view inperspective of the window-stage in place in a window, the window silland casing being indicated in outline only.

Referring to the drawings, A and B are side bars which when thewindow-stage is in place lie substantially parallel with the interior ofthe casing C. The side bars A and B are attached at their outside endsto a crossbar D by the pivots E and F. In practice I find it convenientto make up the cross-bar D with straps of sheet-iron G and H above andbelow,wl1ich materially increase the strength of the device. At theinner ends of the side bars A and B are placed what for convenience maybe termed casing-hooks I and J ,which I engage the window-casing C at apoint considerably above the inner ends of theside bars A and B. Thisarrangement by which the casing-hooks I and J engage the casing at apoint above the ends of the side bars is very important, because itinsures the windowstage against tilting or tipping, while at the sametime it puts the minimum of strain upon the various parts. Thecasing-hooks I and J may be made of any convenient form. In practice Ifind it convenient to make them substantially of the form shown in theaccompanying drawings, in which the part K, which engages thewindowcasing, is supported by a vertical rod L, which is screwed orotherwise suitably attached at its lower end to the rear end of the sidebar, as shown at It B, Fig. 3, a shoulder Q being formed at the lowerend of the vertical supporting-rod L in order that the screws R R may berelieved as mush as possible of the strain. A brace M extends diagonallyfrom the casing-hook K to the upper side of the side bar, so that thestrain on the casing-hook is as direct as possible. The ends of thecasing-hooks K which engage the casing are made, preferably, at a slightangle with the side bars A and B, as seen clearly in the plan view, inorder that the said hooks may engage the window-casing when used withwide windows at a point as near as possible to the corner of the casing,which prevents as much as possible any twisting .orwringing action uponthe support L and brace M. It will be noticed that the upper edge of thebolster N is inclined slightly as compared with the lower edge,'so thatthe stage when in place in the window slants slightly toward thebuilding. This arrangement prevents the stage from sagging or anyarticles which are placed on the stage from sliding off.

The window-stage is supported upon the window-sill by means of a steppedbolster N, which is attached to the side bars by the connectinglink O. Aplate P, containing notches for the reception of the connecting-link O,is located at the upper edge of the said side bar. The points of thenotches in the said plate P are inclined somewhat toward the inner endof the side bar, as shown in Fig. 2, in order that there may be nopossibility of the link 0 becoming disengaged from the said notches, andthus releasing the bolster.

In practice I find it convenient to make the casing-hook K, its supportL, the brace or tierod M, and the plate I all in one casting, frommalleable iron or other suitable material, as this constructionfacilitates putting the parts together and affords a maximum of strengthwith a minimum of weight.

In order that the side bars A and B, provided with the casingehooks Iand J, may be held securely in engagement with the sides of thewindow-easing, a spreader is provided which consists of a telescopicslide comprising two suitable lengths of pipe S and T, attached to thevertical supporting-rods L by eyes U, one of the pipes, as T, being of adiameter slightly less than thatof the other pipe S. The smaller pipe Tis screw-threadedfor a distance from its inner end, as shown at V, andprovided with a correspondingly screwthreaded collar or nutX, by meansof which the larger pipe Smay beforced longitudinally along the otherpipe T, so that the side bars A and B may be spread to any desiredposition and fixed there. the said side bars being forcibly held againstthe sides of the windowcasing. It will be seen that this arrangement ofparts forms a convenient means for adjusting the window-stage for anydesired size of window with which it is to be used and for locking theparts in position when adjusted.

Then the window-stage is not in use, the smaller pipe T may be withdrawnfrom the larger pipe S and swung about the eye U until in -a positionsubstantially parallel to the sidebars A and B, after which the sidebars A and B may be swung about their pivots E and F until the ends ofthe side bars A and B engage each other. When the parts are in thisposition, the window-stage is in a convenient condition to be moved orstored.

WVhat I claim is 1. In a window-stage, in combination, two side bars, across'tiebar pivotally connected to both of said bars at the outer ends,an extensible connection between said side bars at their forward ends,said extensible connection consisting of two bars, one of which 1spivotally connected with one of said side bars and the other of which ispivotally connected with the other of said side bars, the inner ends ofsaid two members having telescopic connection with each other, means formoving said two members longitudinally with relation to each other inopposite directions,and holding them in their adjusted position, theaxis of the pivotal connection between each of said members and itsrespec two side bar belng at right angles with the side bar, wherebywhen said telescopic memhere .are disengaged from connection with eachother, each may be swung parallel with its respective side bar, andmeans for securing the inner ends of the side dow-casing.

2. In a win dow-stage, in combination, two side bars, a cross tie-barpivotally connected with both of said side bars at the outer ends, eachof said side bars having secured at its inner end a vertical arm whichextends above the forward end of the side bar, a hook which extendslaterally outward from the upper end of said vertical arm and is adaptedto engage a window-casing, an extensible connection between said sidebars at the forward ends, said extensible connection consisting of twobars, one of which is pivotally connected with the vertical arm of oneof said side bars and the other of which is pivotally connected with thevertical arm of swing around parallel with its respective side bar, andmeans cooperating with said hooks to secure the stage to awindow-casing.

3. In a window-stage, the combination of two side bars, a cross-barpivotally connected to the outer ends of both of said side bars, an

bars to a win- 7 extensible connection between said side bars at theforward ends pivotally connected therewith, each of said side barshaving secured at its inner end a vertical arm which extends above theforward end of the side bar, a hook which extends laterally outward fromthe upper end of said vertical arm and is adapted to engage awindow-casing, a ratchet-plate secured to the upper side of the side barat some distance back from the end thereof, an inclined arm connectingthe upper end of said vertical arm with said ratchetplate, a steppedbolster on the under side of the side bar and a link connection betweensaid bolster and said ratchet-bar, said bolster being adapted to engagethe window-sill while said hooks engage the window-casing.

I11 testimony whereof I affix my signature in presence of two witnesses.

BENJAMIN F. EARL.

l/Vitnesses GEORGE P. DIKE, J. HENRY PARKER.

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